Manufacturing · EU Taxonomy Activity Guide

Manufacture of hydrogen under the EU Taxonomy

Hydrogen sits at the centre of EU industrial decarbonisation strategy, and the Taxonomy treats its manufacture with a single technology-neutral test: a life-cycle greenhouse gas emissions threshold per tonne of hydrogen. Electrolytic hydrogen on clean power passes comfortably; fossil-based routes need capture. The evidential crux is the life-cycle calculation itself.

Activity ID

CCM 3.10

NACE code

C20.11

Objective

Climate change mitigation

Sector

Manufacturing

Why this activity matters

The EU’s hydrogen strategy targets large-scale renewable hydrogen for industry and transport, backed by substantial public and private financing. Taxonomy alignment matters to that financing: electrolyser projects, hydrogen offtake-backed infrastructure and industrial conversion programmes all reference alignment in green financing frameworks and fund classifications.

The Taxonomy’s approach is deliberately technology-neutral: it does not name colours (green, blue, grey) but sets a life-cycle emissions ceiling for the product. In practice, electrolysis powered by renewable or predominantly low-carbon electricity clears the threshold; steam methane reforming only approaches it with high-capture CCS; and the assessment turns on the rigour of the life-cycle assessment, including the treatment of electricity sourcing, which is where most of the questioning concentrates.

What alignment requires

A single quantitative test carries substantial contribution, with the usual DNSH architecture around it. In summary:

Area	What is required (summarised)
Life-cycle emissions	Life-cycle GHG emissions of the hydrogen produced must sit below the Taxonomy ceiling (set as a reduction against a fossil comparator, working out to roughly 3 tCO2e per tonne of hydrogen). Evidenced by an ISO-compliant life-cycle assessment.
Electricity sourcing (electrolysis)	For electrolytic hydrogen, the emissions attributed to the input electricity dominate the result: renewable PPAs, grid factors and temporal matching assumptions must be documented and defensible.
Capture route (reformed hydrogen)	Fossil-based production can qualify only where CCS with high capture rates brings the life-cycle figure under the ceiling, with the capture and storage chain itself meeting Taxonomy requirements.

Summarised for orientation; the assessment itself applies the full criteria text of the Delegated Acts as amended.

Where DNSH scrutiny falls

Water (electrolysis)

Electrolysis consumes demineralised water; sourcing and discharge need addressing, particularly in water-stressed locations.

Pollution prevention

Standard industrial permitting and BAT conformity for the production installation.

Climate adaptation

CRVA for the facility, including water availability as a climate-sensitive dependency.

Circular economy

Electrolyser stack materials and end-of-life handling are the emerging documentation point.

Documentation that typically supports the assessment

Life-cycle assessment of hydrogen production emissions (ISO 14040/44 or equivalent)
Electricity sourcing evidence: PPAs, guarantees of origin, grid emission factors, temporal matching approach
Process flow and energy balance for the production route
CCS capture rate and storage documentation (reformed routes)
Water sourcing and discharge permits (electrolysis)
Climate risk and vulnerability assessment

How Censatim assesses it

Hydrogen assessments concentrate on one number and how it was produced: the life-cycle emissions figure. Our questioning probes the LCA boundary, the electricity accounting for electrolytic routes, and the capture assumptions for reformed routes, because those choices swing the result. A well-documented LCA typically yields a high-confidence conclusion; an asserted figure without methodology does not.

Censatim is an expert-built EU Taxonomy assessment tool: describe the asset or activity in plain language, upload supporting documents, and answer a short set of targeted questions. The result is a criterion-by-criterion view with an In-line / Partial / Not aligned / Undetermined rating and a confidence level for each dimension. See the full methodology.

Frequently asked questions

What emissions threshold does hydrogen need to meet under the EU Taxonomy?

Hydrogen manufacture must demonstrate life-cycle GHG emissions below the Taxonomy ceiling, defined as a substantial reduction against a fossil comparator and working out to roughly 3 tonnes of CO2e per tonne of hydrogen. The exact figure should be verified against the Delegated Act as amended.

Is green hydrogen automatically Taxonomy aligned?

The Taxonomy does not use colour labels. Electrolytic hydrogen on renewable electricity will normally clear the life-cycle threshold, but it must still be evidenced by a proper life-cycle assessment, and the electricity sourcing assumptions are exactly what an assessment scrutinises. DNSH and Minimum Safeguards also still apply.

Can blue hydrogen (with CCS) qualify under the EU Taxonomy?

Potentially. Reformed hydrogen qualifies only where carbon capture brings the life-cycle emissions under the ceiling, which requires high capture rates and a compliant transport and storage chain. The life-cycle assessment must include upstream methane emissions, which is often where reformed routes struggle.

What is the most common evidence gap in hydrogen assessments?

The life-cycle assessment methodology, and specifically the electricity accounting for electrolytic hydrogen: whether grid electricity, PPA coverage and temporal matching are treated defensibly. A stated emissions figure without its methodology behind it produces a low-confidence rating.

Assess manufacture of hydrogen now

Free eligibility in under a minute. The sector and activity are pre-filled for you.

Asset assessment →Corporate reporting →